Objectives: To examine similarities and differences in the level of knowledge about informed consent in both groups of respondents, to determine differences in gender-related anxiety levels in both groups of respondents, to determine age-related anxiety levels in both groups of respondents and to determine differences in level of anxiety in relation to the level of education, marital status and number of children in both groups of respondents. Study Design: A cross-sectional study. Participants and Methods:The respondents are all the patients older than 18 years who were subjected to coronarographyduring May 2017. Eighty patients participated in the study, 48 men and 32 women. A questionnaire by dr. sc. GazdekDavorka, a public health specialist, was used for the purpose of the research. The survey questionnaire consists of 13 questions about informed consent. The respondent answers each question with “yes”, “no” or “do not know”. The level of anxiety in a patient was examined by Beck's Self-Assessment Questionnaire (Beck Anxiety Inventory), written by Aaron T. Beck. The questionnaire consists of 21 questions to which a respondent choosesa response on a scale value of 0 to 3 (0-not at all;1-mildly;2-moderately;3-severely). Results: 60 % of male and 40 % of female respondents (p = 0.074) participated in the study, and the average age ofrespondents was 63.65 years. Statistically significant differences were found in justone question, on the consent foran underage or a disabled person (p = 0.028). It is noticeable that more male than female respondents think that consentshould be given by a legalcounsel / guardian. Conclusion: Both patients and doctors should know that the consent of a notified patient is not just a “plain form”which needs to be filled in and signed. The patient and the doctor must be aware of their rights and obligations during the treatment process.